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Question: Answered & Verified by Expert
Which of the following statements is true regarding measuring the potential barrier across a p-n junction using a voltmeter?
ChemistrySemiconductorsNEET
Options:
  • A Yes, as the voltmeter automatically adjusts to the junction's resistance.
  • B No, because the voltmeter must have a resistance very high compared to the junction resistance, the latter being nearly infinite.
  • C Yes, as the potential barrier can be directly read from the voltmeter's display.
  • D No, because the potential barrier is not a measurable quantity using a voltmeter.
Solution:
2972 Upvotes Verified Answer
The correct answer is: No, because the voltmeter must have a resistance very high compared to the junction resistance, the latter being nearly infinite.
Correct Option is : (B)
No, because the voltmeter must have a resistance very high compared to the junction resistance, the latter being nearly infinite.

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